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Permanent link (DOI): https://doi.org/10.7939/R3TQ5RR0D

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Cuticle Micromorphology of Podocarpus, Subgenus Podocarpus, Section Scytopodium (Podocarpaceae) of Madagascar and South Africa. Open Access

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Author or creator
Stockey, R.A.
Frevel, B.J.
Woltz, P.
Additional contributors
Subject/Keyword
Podocarpaceae
New Zealand
Laubenfels
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
Cuticle micromorphology of leaves from seven species and three varieties of the conifer genus Podocarpus subgenus Podocarpus section Scytopodium from South Africa and Madagascar was studied with scanning electron microscopy. External and internal features of abaxial and adaxial cuticles are characterized for all taxa and are compared with other known Podocarpus species. External cuticles exhibit Florin rings and stomatal plugs with underlying epidermal cell outlines usually visible. Leaves are hypostomatic and stomata occur in discontinuous but fairly regular rows in most species. Stomata are oriented parallel to the long axis of the leaf and usually lack polar subsidiary cells. From two to six subsidiary cells occur, with two or three being the most common. Internal cuticle on subsidiary cell surfaces is granular to rugose, usually with a deep groove corresponding to the external Florin ring. Cuticle on guard cell surfaces is granular or rugose to pitted, and prominent polar extensions are present in all species. Epidermal cell outlines are undulating and cuticle on epidermal cell surfaces is granular to rugose and pitted. The most useful characters to distinguish species of this section are the micromorphology of cuticle on the guard cell and subsidiary cell surfaces, epidermal cell shapes, and sometimes the length of polar extensions.
Date created
1998
DOI
doi:10.7939/R3TQ5RR0D
License information
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Copyright 1998 by The University of Chicago
Citation for previous publication
Stockey, R.A., Frevel, B.J., and Woltz, P. (1998). Cuticle Micromorphology of Podocarpus, Subgenus Podocarpus, Section Scytopodium (Podocarpaceae) of Madagascar and South Africa. International Journal of Plant Sciences, 159(6), 923-940
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File title: Cuticle Micromorphology of <italic>Podocarpus</italic>, Subgenus <italic>Podocarpus</italic>, Section <italic>Scytopodium</italic> (Podocarpaceae) of Madagascar and South Africa
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